netgear wg311t in Power Mac G4 MDD FW400

I'm trying to figure out a way to network my Power Mac G4 without running a long ethernet cable through the house. The cable modem and wireless router are downstairs in the living room (the only cable hookup in the house). The office with the Power Mac is upstairs. There's also my MacBook Pro (Early 2008), which I am currently networking to the Power Mac via firewire. The Power Mac gets its internet connection through the MBP. Of course, the MBP comes and goes, so I don't want to rely on it for a network connection for the Power Mac. Furthermore, I have a networked (ethernet) HP laserjet that I'd like to have on the network. Here is what I have:

• A Netgear WG311T PCI wireless adapter that I used in a Windows machine a couple years ago. If I could get this to work in the Power Mac, I could connect the HP printer directly to the Power Mac and share the printer that way. This is an Atheros-based card, and no Mac OS drivers were ever released by Netgear. I've messed around with some kernel extensions trying to get the operating system to recognaize the card, but haven't had any success. The annoying thing is, I own the Orangeware driver that could work (I had a Netgear card in my PowerMac G4 that required it), but Orangeware doesn't exist anymore, so I can't register the serial number, so I can't use the driver for more than 10 minutes at a time.
• A Netgear WPN824 v2 that was my wireless router before I got the WNDR3300 (I think that's the model). I tried to use this as a wireless access point, but you have to network it via ethernet to the other router, which doesn't help me at all. It won't work as a repeater - only v3 does that.
• The Power Mac is the firewire 400 version, not firewire 800, so the fastest Airport card I can put in it is wireless-B. No way.
• I have a USB 2 PCI card in the Power Mac, so I could buy a USB wireless-N adapter. I'd like to avoid buying anything else, though.

Any suggestions?